Method of evaluating core muscles by bioimpedance technology

Abstract

A method of evaluating core muscles by bioimpedance technology, includes the steps of: (a) measuring the resistance and reactance of a subject by a bioimpedance measuring instrument, and obtaining the subject's age, gender, and impedance factor (h 2 /Z), and (b) calculating the cross-sectional area of the subject's core muscles by the following formula: BIA=a−b×age+c×h 2 /Z+d×Sex. Thereby, measures the cross-sectional area of the core muscles by bioimpedance analysis. The core muscles can be evaluated by the cross-sectional area of the core muscles, which can effectively reduce the measurement cost, reduce the measurement time and improve the convenience of measurement.

What is claimed is: 
     
       1. A method of evaluating core muscles by bioimpedance technology, comprising the steps of:
 (a) attaching a plurality of electrode sets on hands and feet of a subject in a way that two of the plurality of electrode sets attaching the hands or the feet of the subject to form a measurement loop, measuring and obtaining a resistance and a reactance of the subject by the plurality of electrode sets of a bioimpedance measuring instrument, and obtaining age, gender, and impedance factor (h 2 /Z) of the subject; and 
 (b) according to the age, the gender and the obtained impedance fact of the subject, calculating a cross-sectional area of core muscles of the subject by a following formula: CM BIA =a−b×age+c×h 2 /Z+d×Sex, wherein CM BIA  is a cross-sectional area of core muscles measured by a bioelectrical impedance analysis, and a−d in a calculation formula are regression coefficients in a regression analysis. 
 
     
     
       2. The method of evaluating core muscles by bioimpedance technology as claimed in  claim 1 , wherein said core muscles are one or all of psoas major, quadratus lumborum, erector spinae, and abdominal muscles. 
     
     
       3. The method of evaluating core muscles by bioimpedance technology as claimed in  claim 1 , wherein when said core muscles are abdominal muscles, a formula of said core muscles is AM BIA =CM BIA −PM BIA −QM BIA −ES BIA , wherein AM BIA , CM BIA , PM BIA , QM BIA , ES BIA  are cross-sectional areas of abdominal muscles, core muscles, psoas major and quadratus muscle measured by the bioelectrical impedance analysis.